Emperor of the Daleks! was a 1993 multi-Doctor comic story in the pages of Doctor Who Magazine. Its publication ran across the landmark 200th issue of DWM and part which appeared in that issue was originally printed in full colour, a highly unusual occurrence in the magazine at that time.

The Sixth Doctor mentions a "mattress in Perivale" to the Seventh Doctor. This is a reference to TV: Survival . However, in that particular story, the Doctor landed on an abandoned sofa, not a mattress, so presumably the Sixth Doctor is misremembering slightly. (On the other hand, writer Paul Cornell could have slipped up.)